A STANDARD EVOLUTION LIBRARY. 



ence and observation in every region of the world, the work lias ibcorporated 

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XVII. 

 Elements of Geology. A Text-Book for Colleges and for the General 

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ETolution and its Relation to Religions Tlionglit. By Joseph 

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XIX. 



The Origin of the Fittest: Essays on Evolution. By Professor 

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XX. 



Animal Life, as affected by the Natural Conditions of Exist- 

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XXI. 



Anthropology : An Introduction to the Study of Man and Civilization. 



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xxn. 

 First Principles. By Herbert Spencer. Part I. The Unknowable. 

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XXIII. ' 



The Principles of Biology. By Herbert Spencer. 2 vols., 12mo. 



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XXIV. 



The Principles of Psychology. By Herbert Spencer. 2 vols., 

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XXV. 



The Principles of Sociology. By Herbert Spencer. 12mo. 

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The Data of Ethics. By Herbert Spencer. Being Part I, Vol. I, 

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xxvn. 



Illustrations of Universal Progress. By Herbert Spencer. 

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